docs: def minute_his(self, symbol='', datetime='20161209'):
          '''
          分时历史数据
  
          :param market:
          :param symbol:
          :param datetime:
          :return: pd.dataFrame or None
          '''
          market = get_stock_market(symbol)
  
          with self.client.connect(*self.bestip):
              data = self.client.get_history_minute_time_data(
                  int(market), symbol, datetime)
              return self.client.to_df(data)